IRF Inter. Rectifier, Bay Linear, Inc. Canada, IRF9640, -200V, 125W, -11A, RDS(on)=0.50Ω 
Single P-Channel HEXFET Power MOSFET, 
Repetitive Avalanche Rated, 
Dynamic dv/dt Rating, 
Ease of Paralleling, 
Fast Switching, 

Case type: TO-220AB-3PIN 

1 - GATE 
2 - DRAIN 
3 - SOURCE